bbbb bbbs bobb bobo bobs boko boks bomb boms boob book boom boor boos bor- bork borm boro borr bors bosk bosm boso boss brkb brob brok brom broo bror bros brrm brrr brrs brsb brsr bsms bsos bsrm bssm k-os kbbb kbbk kbbm kbbo kbbr kbbs kbkb kbkk kbko kbkr kbmb kbmo kbmr kbms kbob kbok kboo kbos kbrb kbrk kbro kbsb kbsk kbsm kbso kbsr kbss kkbb kkbo kkbr kkbs kkkk kkmk kkmo kkmr kkms kkob kkoo kkor kkrb kkrk kkro kkrr kkrs kksm kksr kkss kmbr kmbs kmkk kmko kmks kmmk kmmm kmmo kmmr kmms kmob kmok kmom kmor kmrb kmro kmrr kmrs kmsb kmso kmsr kmss kobb kobk kobo kobr kobs kokb kokk koko kokr koks komb komo komr koms koob kook kooo koor koos korb kork koro korr kors kos- kosb koso kosr koss krbb krbk krbm krbr krkk krko krkr krks krmb krmo krmr krms krob krok krom kroo kror kros krrb krrk krrm krro krrr krrs krsk krsr krss ksbr ksbs kskb kskk ksko kskr ksks ksmb ksmm ksmo ksmr ksms ksob ksok ksom ksoo ksor ksos ksrb ksrm ksro ksrr ksrs kssm ksso kssr ksss mbbs mbms mbrs mkks mksm mmmm mmms mmor mobb mobo mobs moko momo moms moob mook moor moos morb mork moro mors mosk moso moss mrbb mrbm mrbs mrkr msmb msmm msms msor msrb mssm mssr obbo obkb obok obor obos obro obsr obss okko okmo okok okom okor okro okso ombo omo- omoo omor omro omsk ooms oooo ooos orbb orbo orbs orko ormo oro- orok orom oror oros orro orrs orsk orso osm- osmo osoo osor osos osro ossb osso rbbb rbbr rbbs rbmk rbms rbss rkos rkss rmbs rob- robb robo robs rokk roko rokr roks romb romk romm romo roms roob rook room roor roos rork roro roso ross rrkm rrrr rsos s-os sbbs sbor sbrk skor skss smkb smok smos smrk smss sobo sobr sobs sokk soko somb somm somo sook soom soor soos sorb sorm soro sorr sors soso soss sros ssbr ssrm ssrs sssb sssm ssss